Services
Gas
Manage gas pipework, appliances, ventilation/clearance requirements, testing, certification, and coordination with hot water, cooking, or heating systems.
How to execute this stage
Micro-stage control plan
Work through each applicable step in order. A hold point means pause the dependent decision or work until the stated evidence and authorised review are complete.
01Confirm whether the project actually includes gas and identify the appliance, cylinder/meter, pipe route, clearances, flues, and ventilation requirementsLevel 2 · Services
TaskCheckHold pointEvidenceRecordNext actionSimple explanation
Confirm whether the project actually includes gas and identify the appliance, cylinder/meter, pipe route, clearances, flues, and ventilation requirements.
Technical context
Coordinate this work against Gas layout, NZBC G11 guidance, the current consent status, and the actual site condition. Confirm interfaces before releasing dependent work.
Why it matters: The main recorded risk is: Gas leak. A missed check can create rework, delay, hidden defects, an inspection failure, or a departure from approved project documents.
Prerequisites
- Gas layout is current, approved for the intended use, and available to the people doing the work.
- NZBC G11 guidance and relevant product information have been checked.
- Access, responsibility, safety controls, preceding work and the gas pressure test sequence are confirmed.
Checks
- Check the completed work against Gas layout and NZBC G11 guidance.
- Check specifically for: Gas leak.
- Avoid this known mistake: Treating gas like ordinary plumbing.
Evidence to save
- Wide, location-identifying and close-up photographs of the completed gas work before it is concealed.
- Marked-up Gas layout or a precise drawing/detail reference.
- Gas pressure test result, consultant record, trade QA record or written not-applicable reason.
Hold point
Do not cover, backfill, load, connect, certify or release the next activity until Gas pressure test and the required project evidence are complete or the authorised reviewer confirms what may proceed.
Stop or escalate when
- Gas leak
- Treating gas like ordinary plumbing
- The current drawing, approval, competent reviewer or required evidence cannot be confirmed.
Documents and records
- Gas layout
- NZBC G11 guidance
- Current RFI/site-instruction/change record
- Inspection and evidence register
- Cost effect
- Rectification, reinspection, delay, damaged follow-on work, access loss and changed scope can increase the cost of gas. Record the cause and obtain written pricing before approving a commercial change.
- Programme effect
- This activity controls the release of dependent work. Update the lookahead programme and notify affected trades if the hold point, information, inspection or evidence is not ready.
Next action
Check gasfitter licensing, testing, certification, access, protection, and as-built route photos.
Applicability: Apply when this work package is included in the current project scope. Confirm project-specific consent, contract, design, site and authority requirements.
Use the current consented/issued project documents and competent site review. BuildPath does not approve work.
02Check gasfitter licensing, testing, certification, access, protection, and as-built route photosLevel 2 · Services
TaskCheckHold pointEvidenceRecordNext actionSimple explanation
Check gasfitter licensing, testing, certification, access, protection, and as-built route photos.
Technical context
Coordinate this work against Appliance details, Appliance manufacturer manual, the current consent status, and the actual site condition. Confirm interfaces before releasing dependent work.
Why it matters: The main recorded risk is: Wrong flue/clearance. A missed check can create rework, delay, hidden defects, an inspection failure, or a departure from approved project documents.
Prerequisites
- Appliance details is current, approved for the intended use, and available to the people doing the work.
- Appliance manufacturer manual and relevant product information have been checked.
- Access, responsibility, safety controls, preceding work and the final appliance commissioning sequence are confirmed.
Checks
- Check the completed work against Appliance details and Appliance manufacturer manual.
- Check specifically for: Wrong flue/clearance.
- Avoid this known mistake: No route photos.
Evidence to save
- Wide, location-identifying and close-up photographs of the completed gas work before it is concealed.
- Marked-up Appliance details or a precise drawing/detail reference.
- Final appliance commissioning result, consultant record, trade QA record or written not-applicable reason.
Hold point
Do not cover, backfill, load, connect, certify or release the next activity until Final appliance commissioning and the required project evidence are complete or the authorised reviewer confirms what may proceed.
Stop or escalate when
- Wrong flue/clearance
- No route photos
- The current drawing, approval, competent reviewer or required evidence cannot be confirmed.
Documents and records
- Appliance details
- Appliance manufacturer manual
- Current RFI/site-instruction/change record
- Inspection and evidence register
- Cost effect
- Rectification, reinspection, delay, damaged follow-on work, access loss and changed scope can increase the cost of gas. Record the cause and obtain written pricing before approving a commercial change.
- Programme effect
- This activity controls the release of dependent work. Update the lookahead programme and notify affected trades if the hold point, information, inspection or evidence is not ready.
Next action
Coordinate penetrations and cladding/roof flashing details for flues or external appliances.
Applicability: Apply when this work package is included in the current project scope. Confirm project-specific consent, contract, design, site and authority requirements.
Use the current consented/issued project documents and competent site review. BuildPath does not approve work.
03Coordinate penetrations and cladding/roof flashing details for flues or external appliancesLevel 2 · Services
TaskCheckHold pointEvidenceRecordNext actionSimple explanation
Coordinate penetrations and cladding/roof flashing details for flues or external appliances.
Technical context
Coordinate this work against Flue details, Gasfitting certificate requirements, the current consent status, and the actual site condition. Confirm interfaces before releasing dependent work.
Why it matters: The main recorded risk is: Unprotected pipe. A missed check can create rework, delay, hidden defects, an inspection failure, or a departure from approved project documents.
Prerequisites
- Flue details is current, approved for the intended use, and available to the people doing the work.
- Gasfitting certificate requirements and relevant product information have been checked.
- Access, responsibility, safety controls, preceding work and the certificate review sequence are confirmed.
Checks
- Check the completed work against Flue details and Gasfitting certificate requirements.
- Check specifically for: Unprotected pipe.
- Avoid this known mistake: Flue penetration not flashed to E2 detail.
Evidence to save
- Wide, location-identifying and close-up photographs of the completed gas work before it is concealed.
- Marked-up Flue details or a precise drawing/detail reference.
- Certificate review result, consultant record, trade QA record or written not-applicable reason.
Hold point
Do not cover, backfill, load, connect, certify or release the next activity until Certificate review and the required project evidence are complete or the authorised reviewer confirms what may proceed.
Stop or escalate when
- Unprotected pipe
- Flue penetration not flashed to E2 detail
- The current drawing, approval, competent reviewer or required evidence cannot be confirmed.
Documents and records
- Flue details
- Gasfitting certificate requirements
- Current RFI/site-instruction/change record
- Inspection and evidence register
- Cost effect
- Rectification, reinspection, delay, damaged follow-on work, access loss and changed scope can increase the cost of gas. Record the cause and obtain written pricing before approving a commercial change.
- Programme effect
- This activity controls the release of dependent work. Update the lookahead programme and notify affected trades if the hold point, information, inspection or evidence is not ready.
Next action
Close the gas stage, link its evidence, resolve outstanding defects and release only the next applicable stage.
Applicability: Apply when this work package is included in the current project scope. Confirm project-specific consent, contract, design, site and authority requirements.
Use the current consented/issued project documents and competent site review. BuildPath does not approve work.
Trade-to-trade control
Interfaces and release gates
Use the actual consented design, specification and authorised reviewers. These controls help expose gaps; they do not approve work.
Structure, penetrations and building services
Prerequisites
- • Coordinated services routes and fixture/equipment positions are issued
- • Restricted drilling/notching zones and fire/acoustic systems are identified
- • Required sleeves, supports and access panels are agreed
Interface checks
- • No member, brace, connection or fire/acoustic element is altered without authorised detail
- • Falls, ventilation paths, clearances and maintenance access can still be achieved
- • Penetration sealing system matches substrate, service and required rating
Evidence before release
- • Coordinated services drawing or marked-up route
- • Pre-line photographs of every concealed service zone
- • Engineer/designer RFI response and penetration schedule where required
Next team: Insulation, lining and commissioning teams
Open the related Workspace control →What happens in this stage
- Confirm whether the project actually includes gas and identify the appliance, cylinder/meter, pipe route, clearances, flues, and ventilation requirements.
- Check gasfitter licensing, testing, certification, access, protection, and as-built route photos.
- Coordinate penetrations and cladding/roof flashing details for flues or external appliances.
Before work starts
- Confirm the latest issued-for-construction and consented documents for gas are on site, including Gas layout.
- Check NZBC G11 guidance, approved product data, RFIs, minor variations, and amendment status before work starts.
- Confirm the subcontractor understands the scope, hold points, access, protection requirements, H&S controls, and quality evidence required.
- Check the programme sequence so this stage does not start before earlier work, inspections, testing, or concealed-work photos are complete.
- Confirm materials delivered to site match the specification, are dry/undamaged, and are stored according to manufacturer instructions.
During the work
- Walk the work face early, mid-shift, and before close-up. Compare actual work with the consented drawings, specification, and manufacturer details.
- Check set-out, levels, falls, clearances, penetrations, fixings, bracing, waterproofing, or protection points that will be difficult to see later.
- Ask trades to show their own quality checks rather than only saying the work is complete.
- Keep weather, site condition, delivery, delay, inspection, RFI, variation, and safety notes in the daily report.
- Photograph any work before it is covered, backfilled, lined, clad, tiled, painted, or otherwise hidden.
After the work
- Complete a close-out walk with the subcontractor and mark defects immediately while access is still available.
- Confirm required inspection bookings, council results, producer statements, LBP Records of Work, warranties, test certificates, or installer declarations are obtained.
- Update as-built notes where service routes, drainage, fixings, penetrations, or dimensions differ from the design.
- Confirm the area is protected from weather, other trades, impact damage, contamination, or premature loading.
- Update the lookahead programme and tell affected trades what is ready, what is blocked, and what must not be covered.
Common problems and step-by-step solutions
Gas route clash
- 1Stop the affected gas activity if continuing could hide defective work, create unsafe work, or move away from the consented design.
- 2Photograph the condition from wide, medium, and close-up angles. Include a tape, level, datum mark, gridline, or drawing reference where useful.
- 3Check the latest consented architectural, structural, civil, services, and specification documents before giving an instruction.
- 4Ask the subcontractor to explain the cause, proposed fix, timing impact, and whether the fix changes consented work.
- 5Escalate to the builder/project manager, designer, engineer, council inspector, or client when the fix affects structure, weathertightness, drainage, H1, fire/safety, cost, programme, or consent.
- 6Record the decision, responsible person, drawing/RFI/variation reference, photos, and follow-up inspection in the daily report.
Missing gas certificate
- 1Stop the affected gas activity if continuing could hide defective work, create unsafe work, or move away from the consented design.
- 2Photograph the condition from wide, medium, and close-up angles. Include a tape, level, datum mark, gridline, or drawing reference where useful.
- 3Check the latest consented architectural, structural, civil, services, and specification documents before giving an instruction.
- 4Ask the subcontractor to explain the cause, proposed fix, timing impact, and whether the fix changes consented work.
- 5Escalate to the builder/project manager, designer, engineer, council inspector, or client when the fix affects structure, weathertightness, drainage, H1, fire/safety, cost, programme, or consent.
- 6Record the decision, responsible person, drawing/RFI/variation reference, photos, and follow-up inspection in the daily report.
Flue flashing issue
- 1Stop the affected gas activity if continuing could hide defective work, create unsafe work, or move away from the consented design.
- 2Photograph the condition from wide, medium, and close-up angles. Include a tape, level, datum mark, gridline, or drawing reference where useful.
- 3Check the latest consented architectural, structural, civil, services, and specification documents before giving an instruction.
- 4Ask the subcontractor to explain the cause, proposed fix, timing impact, and whether the fix changes consented work.
- 5Escalate to the builder/project manager, designer, engineer, council inspector, or client when the fix affects structure, weathertightness, drainage, H1, fire/safety, cost, programme, or consent.
- 6Record the decision, responsible person, drawing/RFI/variation reference, photos, and follow-up inspection in the daily report.
Verification
Source / where to check
Use current official information and the controlled documents for the actual project.
The issued consent drawings, stamped specifications, engineering drawings, RFIs, minor variations, and amendments control the specific project.
Use the exact current installation manual, warranty requirements, BRANZ/Appraisal information where applicable, and product data sheet for the product on site.
Insufficient data to verify — confirm against the current consented drawings, specifications, Auckland Council requirements, Auckland Unitary Plan, NZ Building Code, relevant NZ Standard, consultant advice, manufacturer instructions, insurance broker, insurer, lender, lawyer, accountant or project contract.
The issued consent drawings, stamped specifications, engineering drawings, RFIs, minor variations, and amendments control the specific project.
Use the exact current installation manual, warranty requirements, BRANZ/Appraisal information where applicable, and product data sheet for the product on site.
Insufficient data to verify — confirm against the current consented drawings, specifications, Auckland Council requirements, Auckland Unitary Plan, NZ Building Code, relevant NZ Standard, consultant advice, manufacturer instructions, insurance broker, insurer, lender, lawyer, accountant or project contract.
Project-specific consented documents and professional advice override generic guidance.
Common inspections required
- Gas pressure test
- Final appliance commissioning
- Certificate review
Common risks
- Gas leak
- Wrong flue/clearance
- Unprotected pipe
- No certificate
- Unsafe appliance location
Common mistakes
- Treating gas like ordinary plumbing
- No route photos
- Flue penetration not flashed to E2 detail
Required documentation
- Latest consented drawings and specifications
- Relevant RFIs, site instructions, amendments, minor variations, and variation approvals
- Subcontractor scope, QA checklist, delivery dockets, product data, and installation records
- Inspection booking/result records and photos before cover-up
- Daily site report notes covering labour, weather, progress, delays, risks, and decisions
Photos or diagrams needed
- Wide photo showing where gas is happening on the site
- Close-up photos of critical details, fixings, laps, seals, penetrations, clearances, levels, or falls
- Photo of product labels, batch numbers, delivery dockets, and installer marks where relevant
- Marked-up drawing or simple diagram showing any changed location, clash, defect, or agreed remedial detail
Construction manager checklist
- 1Scope, drawings, specification, product data, and latest revision confirmed
- 2Trade briefed on hold points, tolerances to verify, evidence required, and inspection sequence
- 3Access, storage, protection, temporary works, and safety controls in place
- 4Work checked against drawings during installation, not only at completion
- 5Photos and records captured before work is concealed
- 6Defects, RFIs, delays, and variations recorded with owner and due date
- 7Inspection/producer statement/warranty/Record of Work requirements tracked for CCC
Questions to ask the subcontractor
- Which drawing, detail, or manufacturer instruction are you working from?
- What needs to be checked before this is covered or handed to the next trade?
- What could stop you today: weather, access, materials, information, inspections, or other trades?
- Does anything on site differ from the drawings or specification?
- What evidence will you provide for the quality file and CCC file?
Red flags to stop work
- Work differs from consented drawings or specification and no approved variation/RFI exists
- A structural, weathertightness, waterproofing, drainage, fire/safety, or H1 detail is unclear
- The trade wants to cover work before inspection, testing, or photos are complete
- Specified materials are missing, substituted, damaged, wet, expired, or installed outside manufacturer instructions
- A safety control is missing for excavation, heights, plant movement, electrical work, asbestos, silica, or public protection
What to record in the daily report
- Exact location and quantity of work completed
- Trade headcount, company names, plant used, deliveries, and material batch/product details
- Weather, site conditions, delays, instructions received, RFIs raised, and inspections booked/passed/failed
- Photos taken before cover-up and any defects or non-conformances found
- Next-day lookahead, blockers, and who is responsible for each action
Use this in my project
Turn gas into controlled action
Open the relevant workspace register, create the project-specific record, link the controlling documents and preserve evidence. The guide does not automatically approve or verify the action.